private static GoogleAuthenticatorImport DeserializeGoogleAuthMigrationData(byte[] b)
{
GoogleAuthenticatorImport gi = new GoogleAuthenticatorImport();
using (var ms = new System.IO.MemoryStream())
{
ms.Write(b, 0, b.Length);
ms.Position = 0;
gi = ProtoBuf.Serializer.Deserialize <GoogleAuthenticatorImport>(ms);
}
return(gi);
}
internal static ProtectedString ParseGoogleAuthExport(string s, out int iOTPCount)
{
iOTPCount = 0;
ProtectedString psResult = ProtectedString.Empty;
try
{
var u = new Uri(s);
var param = System.Web.HttpUtility.ParseQueryString(u.Query);
var b = Convert.FromBase64String(param["data"]);
GoogleAuthenticatorImport gi = DeserializeGoogleAuthMigrationData(b);
GoogleAuthenticatorImport.OtpParameters gAuthData = null;
iOTPCount = gi.otp_parameters.Count;
if (iOTPCount != 1)
{
using (GoogleAuthenticatorImportSelection selForm = new GoogleAuthenticatorImportSelection())
{
Tools.GlobalWindowManager(selForm);
selForm.InitEx(gi.otp_parameters);
if (selForm.ShowDialog(KeePass.UI.GlobalWindowManager.TopWindow) == DialogResult.OK)
{
gAuthData = selForm.SelectedEntry;
if (gAuthData != null)
{
iOTPCount = 1;
}
}
else
{
iOTPCount = -1;
}
}
if (iOTPCount != 1)
{
throw new ArgumentException("Expected exactly one OTP object, found: " + iOTPCount.ToString());
}
}
else
{
gAuthData = gi.otp_parameters[0];
}
KPOTP otp = new KPOTP();
switch (gAuthData.Algorithm)
{
case GoogleAuthenticatorImport.Algorithm.AlgorithmSha256:
otp.Hash = KPOTPHash.SHA256;
break;
case GoogleAuthenticatorImport.Algorithm.AlgorithmSha512:
otp.Hash = KPOTPHash.SHA512;
break;
default:
otp.Hash = KPOTPHash.SHA1;
break;
}
switch (gAuthData.Type)
{
case GoogleAuthenticatorImport.OtpType.OtpTypeHotp:
otp.Type = KPOTPType.HOTP;
otp.HOTPCounter = (int)gAuthData.Counter;
break;
default:
otp.Type = KPOTPType.TOTP;
break;
}
switch (gAuthData.Digits)
{
case GoogleAuthenticatorImport.DigitCount.DigitCountEight:
otp.Length = 8;
break;
default:
otp.Length = 6;
break;
}
otp.Issuer = gAuthData.Issuer;
otp.Label = string.IsNullOrEmpty(gAuthData.Issuer) ? gAuthData.Name : gAuthData.Name.Remove(0, gAuthData.Issuer.Length + 1);
otp.Encoding = KPOTPEncoding.BASE32;
byte[] bSeed = ConvertBase64ToBase32(gAuthData.Secret);
otp.OTPSeed = new ProtectedString(true, bSeed);
psResult = otp.OTPAuthString;
}
catch { }
return(psResult);
}